1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a33a1c8fa197e102ea8d54a3ebac7e013f93f8db2cc3846730ef60995c1657a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0efe10fb-cad7-4642-8237-60032aeb9873.json and https://artists.proofprofile.net/proofs/artist/0efe10fb-cad7-4642-8237-60032aeb9873.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ac-Cent-Tchu-Ate The Positive - Single Version
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1518435193bae84a9e9c29a3ae54e7165439bfa250d3ed4bebfd040937da4409. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14403685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917d2f9f7f8a7eac4520a0dc9e1f0d91ff3aafa434877e9ca666be49131856ff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14550864.
A Centennial Anthology Of His Decca Recordings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a82d33c68dc85f5d72bced3cc1fd9679269319169ca437091691efacd5c93a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14303197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e501835e13db4f73c93195fcd1134d78dc16076fc1480e6bd1fc50e735c2bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14446502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a6a12a6eeefd75f08570bbaaea3740cda9cdb9702ce05daf3df719e5c029ee. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14450017.
South America, Take It Away - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c683d063a15bf92b1be9c3c78de32e406f571a9fb515d52b419829bc1e3315e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14604178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e501835e13db4f73c93195fcd1134d78dc16076fc1480e6bd1fc50e735c2bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14446502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2393ec9ae19205854e765e56f0f76ebd145b9a0683c712959cceb6278d2d082. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC10112028.
Their Greatest Hits And Finest Performances
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ae4d217ef8a343da284e677139b0db6194ab24b14a7aa6428541a457d945e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14774021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d5939e9e1afc33803d8e7bade7ea984a82098fc1ac8c1d72e48fe9d41bd5d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC13965531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9a90eee0b8daaec4094e477f6ba20a0e8a9bc984c24db17d3635de961160ba. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14472460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5439ed20c4845383737fdd02fa47e7e7c432492536bdf3b35868da9d1cb303. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14472059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caedc1186f4a3b61de10a09c3c94044a19874d186262951eeeea71f4a66e5f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMC14303210.